Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dap hieu moi snippets" » "dao hieu moi snippets", "dat hieu moi snippets", "phap hieu moi snippets", "dap nhiem moi snippets", "dap hieu so snippets", "dap hieu bo snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dap hieu moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dap hieu moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dap hieu moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dap hieu moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.